Expressing-press



A. W. FRENCH.

EXPRESSING PRESS.

APPLICATION FILED APR. n. 1919.

Patented Aug. 16, 1921.

2 SHEETS-SHEET l.

A. W. FRENCH.

EXPRESSING PRESS.

APPLICATlON FILED APR-12. 1919.

1,387,700. Patented Aug- 16,1921.

2 SHEETS-SHEET 2- A ri'oR/vir.

UNITED STATES PATENT OFFICE.

ALFRED w. FRENCH, or PIQUA, omo.

EXPRESSIN'G-PRESS.

Lssvjvoo. I

Specification of Letters Patent.

Patented Aug. 16, 1921.

Application filed April 12, 1919. Serial no. 289,689.

" superimposed charges of meal or material separated by pressplates andcloths are subjected to pressure between opposing rams or pressuredevices in an open-ended press cage which has orifices in its side wallsforthe escape of the expressed oil. In some presses of this type theupper ram, head block or pressure device is caused to enter the upperend of the cage during the pressing operation, whether by reason of theascent of the cage relative to the pressure device or by the descent ofthe latter into the cage, thus depressing the material in the cage andforming a space in the upper end of the cage which is not occupied bythe material. It has been found in practice that more or less oilcollects in this space and overflows the top of the cage, or when thepressure is relieved or the pressure device is withdrawn preparatory todischarging the pressed cakes from the cage, this oil soaks back intothe material in the upper portion of the cage. This is objectionable,both because the cake is left soft and unfit for use and because thereis a loss of oil unless the soft cake is again pressed to recover thisoil.

The object of this invention is to provide efficient means of simple andpractical construction for removing or carrying off this oil from theupper end of the press cage and preventing it from flowing over the topof the cage or soaking back into the meal or material when the pressureis relieved.

The invention is applicable to cage presses of various types ofconstruction or intended for difierent purposes, such for instance asfilling presses which are used for filling the press cages with thecharges of material, and finishing or expressing presses in which thematerial is subjected to pressure for extracting the oil. Such fillingand finishing presses are sometimes used in combination, the filledcages from the filling press being transferred to the finishing pressesfor the final pressure on the material. The invention is herein shown inconnection with both kinds of presses.

In the accompanying drawings:

Figure l is a side elevation partly in sec.- tion, showing theupperportions of a filling press and two finishing; presses provided with oilremoving means embodying the invention.

F 2 isa bottom face View of one of the halves of the upper head block orpressure device.

Fig. 3 is a sectional elevation of the head block or upper pressuredevice of one of the finishing presses.

Fig. 4 is a similar view of a modified form ofpressure block for afinishing press.

Fig. 5 is a fragmentary section, on an enlarged scale, of the head blockshown in Fig. 4Q v e Fig. 6 is a bottom plan view of the head blockshown in Fig. 3.

Fig. 7 is an enlarged sectional elevation of the upper portion of afilling, press showing the two parts of the head block or upper pressuredevice separated for the introduction of the charges into the presscage.

Fig. 8 is a section on line 8-8, Fig. 7, of one of the head blocksections.

. 10, 11 and 12, Fig.- 1, represent respectively a filling press and twofinishing or expressing presses, and 13 represents the open-ended presscages in the filling and finishing presses l0 and 11 respectively. Thesepresses may boot my usual or suitable construction, the filling press10, shown in Fig. 1, being for the purpose of filling the cages, each ofwhich, after being filled with the charges ofmaterial in the fillingpress, isremoved to one of the finishing presses for subjecting thematerial to the final pressure. The cages, as usual, are open at theirupper and lower ends and have upright; side walls with suitable orificesor openings for the escape of the oil from the material. I

In the filling press shown in the drawings, the head block or upperpressure device consists of two halves .or sections 14 and 15 which aremovable horizontally toward and from eachother. lVhen these sections are105 in contact with'each other, as shown in Fig.

'1, they register withand are adapted to enter the upper end of thepress cage. By separating the head block sections as shown in Figr7, anopen space is provided between 110 them above the press cage into" whicha charging or filling device (not shown) is' adapted to enter fordepositing the.succes sive charges of material into the press cage. Theconstruction of the filling pressior ms no part of this invention andonly enough of the upper portion of this press is illus-v trated in thedrawings to 'give an under standing of its use. The two sections 14: and15 of the head block are supported by wheels 16 adapted to travel onhorizontal tracks 17 V and the sections are moved in and out by l toenterthe same vIn both the filling and finishing presses rect'ly to thepinion l8 engaging toothed racks securedto the head block sections; 20indicates yaplunger or ram at the upper. end of the press adapted, -whenthe head blocksectlons are separate chto be moved down into the. pressca e 'for shoving or packing the charges 7 therein. a a

In each of the finishing presses shown, the head blockor upper pressuredevice consists oft-a block 21 stationarily secured on the press head inline with the press cage so as forv pressing the material.

shown the head block or upperpres'sure device is caused to entermore orless the upper end o-fthe press cage by the upwardimovement of the presscage caused by the ascent of the lower ram of the press=during theusual-operation of the press. This presses the material down in the cageandforms a space in the upper end of the cage, unoccupied by thematerial, in which oil expressed from the material can collect.

For removingsuch oil the head block or upper pressure "device for eachpress is prefer ably provided in itslower portion with an oil escapeduct or passage which connects in any suitable way with thesspace in-theupper end ofthe press cage and is connected with a'jpump or devicegfordrawingofithei oil from this space. the filling press shown, a pipe 22in one 23in the bottom-face of said head block section, andconnects atits'upp'er end by a flexible pipe 23 with a main suctionnrpipe 24 Zleading to a suitable pump or suction. device 25. The flexiblepipe 23permits theabov'e described movement of the head block. Any

other suitable kind of connection permitting the movement of the'hea'dblockcould be em- The head block or pressure device: 21 of the finishingpress,-as shown inilFig, 1,

V is similarly provided in itsbottom face-with ployed.

cross grooves 26' connecting with a pip'enQT which extends upth'roughthe head block and isjjconnected to themain suction pipe Qt. 'Since thishead block is stationary,':the :fiexible or movable connection betweentheihead block pipe and the main suction pipe is unnecessary and thepipe27 is'connected di The suction'pipe suction pipe. or'passage of the headblock or pressure depassages for F r tan e,

section of the head'block connects at its lower end with cross groovesupper portion of vice, whether in a filling press or finishing press,canbe connected with escape grooves or passages formed or arranged inthe head blockin any suitable way adapted to form the oil from the spacein the upper part of the press-cage to the suction pipe or passageconnecting withthe head. asshown in Figs. 4: and 5, the cross grooves orpassages 28 leading from the suction pipe to the side edges of thG'PIBSSblock orpressuredevice, are formed in the lower portion of the block orpressure device, preferably between the lower end thereof screws orotherwise'on the end of the head block or pressuredevice. The particulararrangement, formation or disposition of the grooves or passages in the.head'block or and a bottom plate 29 which is fixed by pressure deviceand the suction pipe maybe 1 greatly varied, the purpose being toconnect a suction pipe or passage to the surface or edge portions ofthehead block or part at the upper end of the cage in any way suitable'torrwithdrawing the oil to the best advantage ;trom the space in theupperend of the press cage. The pump25 can'deliverthe oilto any desiredpoint.

.Inthe; use of the apparatus, the pump is. i

thebranch pipe orpassage for eachpress so that the valve forany presswhich is not in operation can-be closed to prevent the entrance of airwhich would destroy the suct-ion.- V p r v I claim as my-invention: V

1. In a press, the combination of a cage in whichthe material isconfined, a pressure device at one end of the cageprovided with an Ollescape passage communicating with theadjacent portionof the cage, andsuction means connected with said escape passage for withdrawing oilfrom the portion of the cage adjacent said pressure device.

Ina press, the combination with a cage in. which the'inaterial isconfined, and a.

jpressuregdeviceadapted to enter the upper end of the cage, of suctlonmeans including passage above-the material confining portlon ,ofsaldcage communlcatlng with said oil therefrom.

-3'.;;I n avpress, the-combination-with a cage in which,thematerial-{is'confined, zand'a pressuregdevice'; adapted tel-.enterthe upper the. cage for withdrawing V end or the cage, thereby Iforminga space in the upper end of the cage unoccupied by material, of suctionmeans in communication with said pressure device and connecting withsaid space for withdrawing oil therefrom.

4. In a press, the combination of a cage in which the material isconfined, and a pressure device adapted to enter the upper end of thecage, thereby forming a space in the upper end of the cage unoccupied bymaterial, the portion of said pressure device which enters the cagehaving an oil escape passage connecting with said space, and suctionmeans connecting with said passage for withdrawing oil from said space.

5. In a press, the combination of a cage in which the material isconfined, and a pressure device adapted to enter the upper end of thecage and having an oil escape passage in its lower portion extending tothe side edge thereof, and suction means connecting with said passagefor withdrawing oil from the upper portion of the cage.

6. In a press, the combination with a cage in which the material issubjected to pressure, of an escape passage for oil from the upperportion of the cage exteriorly of material confined in the cage, and adevice connected with said passage for withdrawing oil from the upperportion of the cage.

7. In a press, the combination of a cage in which the material isconfined, and a pressure device adapted to enter the upper end of thecage and having an oil passage therethrough, of oil receiving grooves inthe lower face of said pressure device and in communication with saidoil passage, and suction means connecting with said passage forwithdrawing oil from the upper portion of said cage.

8. In a press, the combination of a cage in which the material isconfined, and a pressure device movable to enter the upper end of thecage to compress material in the cage, of an oil escape duct movablewith said pressure device for withdrawing oil from the upper portion ofsaid cage.

Witness my hand, this 5 day of April,

ALFRED W. FRENCH. \Vitnesses:

MARGIE WHITLOCK, R. M. DONOVAN.

